Haproxy often breaks mysql connections that results in
"MySQL server has gone away" or similar because of 1 minute
timeouts. Instead the timeouts should be not less than mysql
connections timeouts - in most cases set to 3600s by default
by OpenStack projects.

Change-Id: Ic364f6942cdc6c2f274a508ae548bf964b098da4
Closes-Bug: #1645098